Nominal size: 16 1/4 x 21 1/2 x 1 in Actual sizes available: 16 1/4 x 21 1/2 x 3/4 in and 16 1/4 x 21 1/2 x 1 in AC Furnace Air Filter Comparable to MPR 600 Clean Living Key benefits - Improves indoor air quality by filtering microscopic particles such as lint, dust mites, spores, pollen, pet dander, and dust - Easy to install for standard 16 1/4 x 21 1/2 in furnace air returns; available in 3/4 in and 1 in thickness options - Cost-effective step toward a healthier home environment - Maintenance guidance: change filters every 60 to 90 days; increase frequency to 30 days during peak summer and winter months What makes it stand out - Comparable performance to MPR 600 Clean Living, offering strong filtration for common household irritants Usage scenarios - Allergy-prone households seeking to reduce pollen, dust, and dander in living spaces - Homes with pets, helping to limit pet dander and associated odors in the HVAC system - Busy households or seasonal use where periodic filter replacement is part of maintaining cleaner air and protecting furnace efficiency Applications - Suitable for most AC furnaces that use the 16 1/4 x 21 1/2 inch filter footprint with 3/4 inch or 1 inch thickness - Provides a practical, cost-conscious upgrade to replace a worn or undersized filter, supporting a healthier indoor environment